from datetime import date

class Thoroughbred:
    def __init__(self, mother: 'Thoroughbred', father: 'Thoroughbred', birthyear: date):
        self._mother = mother
        self._father = father
        self._birthyear = birthyear

    def getCurrentAge(self) -> int:
        current_year = date.today().year
        return current_year - self._birthyear.year

    def getFather(self) -> 'Thoroughbred':
        return self._father

    def getMother(self) -> 'Thoroughbred':
        return self._mother